A128514 Triangle, Pell sequence in every column.

1, 2, 1, 5, 2, 1, 12, 5, 2, 1, 29, 12, 5, 2, 1, 70, 29, 12, 5, 2, 1, 169, 70, 29, 12, 5, 2, 1, 408, 169, 70, 29, 12, 5, 2, 1, 985, 408, 169, 70, 29, 12, 5, 2, 1, 2378, 985, 408, 169, 70, 29, 12, 5, 2, 1

Offset: 1

Author

Gary W. Adamson, Mar 05 2007

Keywords

• nonn
• tabl

Comments

Row sums = A048739 starting (1, 3, 8, 20, 49, 119, ...).

Riordan array (1/(1-2x-x^2), x). - Philippe Deléham, Apr 23 2009

Examples

			First few rows of the triangle:
   1;
   2,  1;
   5,  2,  1;
  12,  5,  2,  1;
  29, 12,  5,  2,  1;
  70, 29, 12,  5,  2,  1;
  ...
		

Crossrefs

Cf. A000129, A048739.

Formula

A000129 in every column: (1, 2, 5, 12, 29, ...).